Number Place ver 1.0

    -------- -------- --------
   |  2 6 8 |  9 1 5 |  3 7 4 |
   |  9 1 5 |  4 3 7 |  2 6 8 |
   |  3 7 4 |  2 6 8 |  1 5 9 |
    --------+--------+--------
   |  1 5 9 |  3 7 4 |  6 8 2 |
   |  6 8 2 |  1 5 9 |  7 4 3 |
   |  7 4 3 |  6 8 2 |  5 9 1 |
    --------+--------+--------
   |  4 3 7 |  8 2 6 |  9 1 5 |
   |  5 9 1 |  7 4 3 |  8 2 6 |
   |  8 2 6 |  5 9 1 |  4 3 7 |
    -------- -------- --------